Weather on September 18 at Dry Tortugas
Dry Tortugas National Park
Based on 55 years of data from Key West, FL
Planning Your Visit
September 18th in Dry Tortugas National Park (via Key West, FL) typically brings warm fall weather, with average highs around 89°F and lows near 78°F. Over 55 years of records, the warmest September 18th was in 2018 (88°F average), while the coldest was 2013 (77°F) — a 11°F range across recorded history. Rain or other precipitation has occurred on about 51% of September 18th dates historically, with the wettest September 18th recording 5.59" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for September 18th in Dry Tortugas? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 87°F | 73°F | 5.59" | -- |
| 2024 | 89°F | 79°F | 0.15" | -- |
| 2023 | 96°F | 79°F | 0.13" | -- |
| 2022 | 90°F | 76°F | 0.56" | -- |
| 2021 | 91°F | 83°F | 0" | -- |
| 2020 | 91°F | 81°F | 0.03" | -- |
| 2019 | 92°F | 77°F | 0.76" | -- |
| 2018 | 92°F | 84°F | 0" | -- |
| 2017 | 91°F | 82°F | 0" | 0" |
| 2016 | 91°F | 81°F | 0" | -- |
| 2015 | 85°F | 77°F | 0.1" | -- |
| 2014 | 87°F | 77°F | 0" | -- |
| 2013 | 81°F | 74°F | 0.13" | -- |
| 2012 | 85°F | 76°F | 0" | -- |
| 2011 | 89°F | 78°F | 0" | -- |
| 2010 | 86°F | 80°F | 0" | 0" |
| 2009 | 89°F | 80°F | 0" | 0" |
| 2008 | 90°F | 79°F | 0" | 0" |
| 2007 | 88°F | 79°F | 0" | 0" |
| 2006 | 88°F | 78°F | 0.13" | 0" |
| 2005 | 92°F | 78°F | 0.53" | 0" |
| 2004 | 90°F | 78°F | 0" | -- |
| 2003 | 90°F | 78°F | 0.05" | -- |
| 2002 | 89°F | 82°F | 0" | 0" |
| 2001 | 87°F | 79°F | 0.18" | 0" |
| 2000 | 90°F | 77°F | 0.94" | -- |
| 1999 | 89°F | 75°F | 1.5" | -- |
| 1998 | 85°F | 78°F | 1.04" | 0" |
| 1997 | 88°F | 73°F | 0" | 0" |
| 1996 | 90°F | 79°F | 0" | 0" |
| 1995 | 89°F | 78°F | 0.08" | 0" |
| 1994 | 90°F | 81°F | 0" | 0" |
| 1993 | 90°F | 81°F | 0" | 0" |
| 1992 | 86°F | 75°F | 1.5" | 0" |
| 1991 | 90°F | 81°F | 0" | 0" |
| 1990 | 89°F | 81°F | 0.23" | 0" |
| 1989 | 89°F | 77°F | 2.64" | 0" |
| 1988 | 88°F | 80°F | 0.13" | 0" |
| 1987 | 91°F | 78°F | 0" | 0" |
| 1986 | 89°F | 80°F | 0" | 0" |
| 1985 | 84°F | 72°F | 2.54" | 0" |
| 1984 | 87°F | 77°F | 0.33" | 0" |
| 1983 | 87°F | 80°F | 0.13" | 0" |
| 1982 | 87°F | 79°F | 0" | 0" |
| 1981 | 91°F | 77°F | 0.05" | 0" |
| 1980 | 89°F | 81°F | 0" | 0" |
| 1979 | 88°F | 78°F | 0" | 0" |
| 1978 | 90°F | 81°F | 0" | 0" |
| 1977 | 89°F | 77°F | 0.56" | 0" |
| 1976 | 86°F | 71°F | 1.35" | 0" |
| 1975 | 91°F | 78°F | 0.03" | 0" |
| 1974 | 90°F | 81°F | 0" | 0" |
| 1973 | 90°F | 80°F | 0" | 0" |
| 1972 | 89°F | 80°F | 0" | 0" |
| 1971 | 91°F | 80°F | 0.23" | 0" |